Controlling a light-emitting diode (LED) with an ESP32 S3 is a surprisingly simple task, especially when employing the 1k resistor. The resistor limits one current flowing through a LED, preventing them from melting http://theengineerstore.in/products/5v-2-1a-3-usb-power-bank-battery-charger-module-circuit-board-step-up-boost-diy